It would have been nice if the screw sizes were separated by the manufacturer.  They came in one big bag of about 75 pieces.  Also do not tighten the screws until all are started. We had to untighten and retighten each piece several times to make it all line up and work.  It took three of us about 2 12 -3 hours to get it all put together with some frustration.  We just hope it lasts for years to come.  Visually it looks good in the space.  We look forward to enjoying it.